删除特定单词或句子后的字符

Question

字符删除是这样的：

input = input.Substring(0, input.IndexOf("/") + 1);

我想在一个单词或句子之后删除

例如删除 [logo] 和 [logo] 之后的所有内容

   string input= "Test test test    Have a nice day,      [logo]<http://www.example.com/>    John Nash  Software Developer    Google" 

新的输入必须是这样的：

string input= "Test test test    Have a nice day,"

谢谢

Answer 1

1. 获取输入词的索引
2. 获取从 0 到 (1) 单词索引的子字符串

Answer 2

好吧，IndexOf、Length，最后，Substring 应该这样做：

string input = "Test test test    Have a nice day,... ";
string search = "Have a nice day,";

input = input.Substring(0, input.IndexOf(search) + search.Length);

编辑：如果您使用电子邮件，您可能需要测试几个结尾：

  string[] finals = new string[] {
    "Have a nice day,",
    "Buy,",
    "yours,"
  };

  int bestIndex = -1;

  foreach (var fin in finals) {
    int index = input.IndexOf(fin);

    if (index >= 0) {
      index += fin.Length;

      if (index > bestIndex) 
        bestIndex = index;
    }
  }

  input = bestIndex < 0 ? input : input.Substring(0, bestIndex);